I see that package lmerTest will compute approximate degrees of freedom via the Satterthwaite method for test of fixed effects from merMod objects, and it uses these to provide some p-values. Great. But how do I extract the computed Satterthwaite degrees of freedom? They are not displayed in the default output of summary.merModLmerTest objects (which is a big "WTF" in itself, but nevermind), not discussed in the package documentation as far as I can tell, and studying str(summary(fittedModel)) has not given any clues about where they are stored... surely they must be saved somewhere, right??

Jake 		 	   		  
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